Bone fixation screw apparatus and fastening method thereof

Abstract

Provided are a bone fixation screw apparatus and a fastening method thereof. More particularly, provided are a bone fixation screw apparatus and a fastening method thereof including a bone screw which is inserted to a lower side of a receiving portion and has a spherical head formed at a proximal end, a collect chuck which is inserted to an upper side of the receiving portion to be connected with the spherical head of the bone screw inside the receiving portion, and a rod which is seated on an upper side of the collet chuck and fixed through a fixing screw fastened to the receiving portion, in which the bone screw and the collet chuck are introduced to the receiving portion in opposite directions to each other. Therefore, it is possible to firmly and easily fasten the bone screw and the collet chunk and prevent the bone screw from being easily separated by external force.

Description

TECHNICAL FIELD[0001]The present invention relates to a bone fixation screw apparatus and a fastening method thereof, and more particularly, to a bone fixation screw apparatus and a fastening method thereof capable of easily fastening a bone screw by inserting the bone screw to the lower side of a receiving portion and inserting a collet chuck to the upper side of the receiving portion and preventing the bone screw from being easily separated by external force by forming variable pitch screw threads at a proximal portion and a distal portion of the bone screw.BACKGROUND ART[0002]In general, a bone fixation screw apparatus is commonly used in orthopedics, neurosurgery, and the like to physically correct or fix the spine while being connected between adjacent vertebrae. A spin fixation procedure using the bone fixation screw apparatus is performed by a method of inserting a plurality of bone screws into the vertebrae, respectively, and connecting and fixing a rod disposed approximatel...

AI Technical Summary

Benefits of technology

The present invention is a bone screw and collet chuck connector device. The device is designed to allow for easier and more secure fastening of bone screws using a collet chuck. The collet chuck and bone screw are introduced in opposite directions to prevent deformation of the receiving portion. The collet chuck and receiving portion are fixed using protrusions and restraint grooves, ensuring stable and firm connection. The proximal portion of the device is designed to prevent separation of the bone screw from external forces. These features enable improved bone fixation and stability during medical procedures.

Problems solved by technology

However, in a conventional bone fixation screw apparatus, deformation frequently occurs between the bone screw implanted in the bone and the receiving portion such that the bone screw is not firmly fixed and the stability is poor.

Further, the conventional bone fixation screw apparatus has a problem in that there is a technical limitation that a collet chuck or the bone screw having an outer diameter relatively larger than an inner diameter of the receiving portion is inserted together to one side of the receiving portion.

In addition, in the conventional bone fixation screw apparatus, since the bone screw has a single screw thread without considering the anatomical characteristics of the bone, there is a problem in that the bone screw is easily separated by the external force when the bone screw is implanted into the bone.

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